Signature verification in python
Signature verification in python When trying to implement OP_CHECKSIG, I am unable to figure out how to do the actual signature verification in python (python3) I obtained the signature, public key, and hashed message digest of a transaction , and now I want to verify the signature. message = '692678553d1b85ccf87d4d4443095f276cdf600f2bb7dd44f6effbd7458fd4c2' pubkey = '042e930f39ba62c6534ee98ed20ca98959d34aa9e057cda01cfd422c6bab3667b76426529382c23f42b9b08d7832d4fee1d6b437a8526e59667ce9c4e9dcebcabb' signature = '30450221009908144ca6539e09512b9295c8a27050d478fbb96f8addbc3d075544dc41328702201aa528be2b907d316d2da068dd9eb1e23243d97e444d59290d2fddf25269ee0e' Since python-ecdsa requires 64 byte input for creating the verifying key, I removed the first byte myself. pubkey = pubkey[2:] I also extracted r and s from the DER encoded signature , and concatenated these to create a 64 byte signature as python-ecdsa requires. r = '9908144ca6539e09512b9295c8a27050d4...